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For input ioctl structures, it is better to check if the pad is zero. Thus, the pad bytes might be usable in the future. Suggested-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Signed-off-by: Lizhi Hou <lizhi.hou@amd.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241217165446.2607585-1-lizhi.hou@amd.com